I have got AC on this problem.

In the description, it says "accuracy to 0.0001".

In the code which I submitted, I use
    printf("%.4lf\n", min_breakage);
to match the point.

When I use the sample input, my output is 3.0000.
But the sample output is 3.

So I think the sample output may be wrong.
Or both the two outputs are correct?